Question

I’m fairly new to OpenGL so maybe the answer will be obvious. I am currently trying to make a blue circle using GL_TRIANGLE_FAN in C++. My problem is that when I set the color using glColor4f, it sets all my other textures to have a blue color over them such as shown below (this is supposed to be silvery metal).

I draw the textures using the method shown below.

glLoadIdentity();
glTranslatef(x,y,0);

glBindTexture(GL_TEXTURE_2D, this->texture); 

glBegin(GL_QUADS);
    glTexCoord2f(0.0f, 0.0f); glVertex3f(0,0,0);
    glTexCoord2f(1.0f, 0.0f); glVertex3f(width,0,0);
    glTexCoord2f(1.0f, 1.0f); glVertex3f(width,height,0);
    glTexCoord2f(0.0f, 1.0f); glVertex3f(0,height,0);   
glEnd();

I’m not sure whether I just have to clear a flag for it to work, but I’ve been stuck for a few days now.

Answer 1

Unbind the texture and set the color back to white after you’re done drawing:

glLoadIdentity();
glTranslatef(x,y,0);

glEnable( GL_TEXTURE_2D );
glBindTexture(GL_TEXTURE_2D, this->texture); 

glBegin(GL_QUADS);
    glTexCoord2f(0.0f, 0.0f); glVertex3f(0,0,0);
    glTexCoord2f(1.0f, 0.0f); glVertex3f(width,0,0);
    glTexCoord2f(1.0f, 1.0f); glVertex3f(width,height,0);
    glTexCoord2f(0.0f, 1.0f); glVertex3f(0,height,0);   
glEnd();

glColor4f(1, 1, 1, 1);
glBindTexture(GL_TEXTURE_2D, 0);

And if you aren’t rendering textures on the next object, disable texturing:

glDisable( GL_TEXTURE_2D );